Regulation of Receptor Tyrosine Kinase Signaling

Receptor tyrosine kinases (RTKs) translate extracellular cues such as growth factors into precisely tuned intracellular responses. Ligand binding induces receptor dimerisation and trans‐autophosphorylation, creating docking sites for adaptors and enzymes that propagate signals through pathways including RAS/RAF/MEK/ERK and PI3K/AKT. Crucial to cellular homeostasis, regulation occurs via negative feedback loops involving phosphorylation of inhibitory motifs, recruitment of suppressor proteins, induction of ubiquitin ligases and receptor endocytosis followed by lysosomal degradation. Key modulators such as Sprouty proteins, MIG6, LRIG1 and protein tyrosine phosphatases attenuate signal amplitude and duration, preventing aberrant proliferation, migration and survival. Crosstalk among RTKs and other receptor families ensures context-dependent outcomes in development, tissue repair and immune function. Dysregulation of any regulatory node underlies many cancers, developmental disorders and resistance to targeted therapies. Recent discoveries into post-translational control, subcellular trafficking and feedback interactomes offer new avenues for therapeutic intervention and precision medicine.

Research from Nature Portfolio

A seminal study on Sprouty1 in triple-negative breast cancer has revealed its role as an intracellular brake on epidermal growth factor receptor (EGFR) signalling. Reduction of Sprouty1 led to enhanced EGFR endocytosis and accelerated receptor degradation, dampening mesenchymal transcription programmes and inhibiting migration and invasion. In xenograft models, Sprouty1 knockdown cells formed smaller tumours with diminished metastatic spread, demonstrating that modulation of endogenous feedback regulators can re-sensitise aggressive cancer cells to EGFR-targeted therapies and reshape tumour cell identity.

Regulation of Receptor Tyrosine Kinase Signaling publication trend

The graph below shows the total number of articles in regulation of receptor tyrosine kinase signaling across all publications each year (not limited to Nature Index journals).

Technical terms

Receptor tyrosine kinase (RTK): A transmembrane receptor that, upon ligand binding, undergoes dimerisation and autophosphorylation to initiate intracellular signalling cascades.

Phosphorylation: The attachment of a phosphate group to proteins, modulating their activity, interactions or localisation.

Ubiquitination: The covalent linkage of ubiquitin to a protein, often marking it for proteasomal or lysosomal degradation.

Endocytosis: The process of internalising cell-surface receptors into vesicles for recycling or degradation.

Feedback inhibitor: A molecule that down-regulates a signalling pathway to prevent excessive or prolonged activation.

MAPK/ERK pathway: A kinase cascade transmitting signals from cell-surface receptors to the nucleus, regulating gene expression and cellular decision-making.

References

1. Suppression of Spry1 inhibits triple-negative breast cancer malignancy by decreasing EGF/EGFR mediated mesenchymal phenotype. Scientific Reports (2016).
2. Sprouty2 Regulates Endocytosis and Degradation of Fibroblast Growth Factor Receptor 1 in Glioblastoma Cells. Cells (2024).
3. PKD phosphorylation and COP9/Signalosome modulate intracellular Spry2 protein stability. Oncogenesis (2023).
4. SPROUTY2, a Negative Feedback Regulator of Receptor Tyrosine Kinase Signaling, Associated with Neurodevelopmental Disorders: Current Knowledge and Future Perspectives. International Journal of Molecular Sciences (2024).